Gallienus, AE Antoninianus. Lyons. 257 AD,

IMP GALLIENVS AVG, radiate, cuirassed bust right
MARTI PROPVG, Mars standing right. holding spear and trophy.

RIC V-1 (Joint Reign) Lyons, 25; Göbl 950. Rated scarce.

Courtesy of MR, "Numis-Student" of the numismatikforum.de
July 2010.